﻿/* 
 * PROJECT: NyARToolkit(Extension)
 * --------------------------------------------------------------------------------
 * The NyARToolkitCS is C# edition ARToolKit class library.
 * Copyright (C)2008-2009 Ryo Iizuka
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * 
 * For further information please contact.
 *	http://nyatla.jp/nyatoolkit/
 *	<airmail(at)ebony.plala.or.jp> or <nyatla(at)nyatla.jp>
 * 
 */

using System;

namespace jp.nyatla.nyartoolkit.cs.core
{

    public class NyARDoubleMatrix22 : INyARDoubleMatrix
    {
        public double m00;
        public double m01;
        public double m10;
        public double m11;
        /**
         * 遅いからあんまり使わないでね。
         */
        public void setValue(double[] i_value)
        {
            this.m00 = i_value[0];
            this.m01 = i_value[1];
            this.m10 = i_value[3];
            this.m11 = i_value[4];
            return;
        }
        /**
         * 遅いからあんまり使わないでね。
         */
        public void getValue(double[] o_value)
        {
            o_value[0] = this.m00;
            o_value[1] = this.m01;
            o_value[3] = this.m10;
            o_value[4] = this.m11;
            return;
        }
        public bool inverse(NyARDoubleMatrix22 i_src)
	    {
		    double a11,a12,a21,a22;
		    a11=i_src.m00;
		    a12=i_src.m01;
		    a21=i_src.m10;
		    a22=i_src.m11;
		    double det=a11*a22-a12*a21;
		    if(det==0){
			    return false;
		    }
		    det=1/det;
		    this.m00=a22*det;
		    this.m01=-a12*det;
		    this.m10=-a21*det;
		    this.m11=a11*det;
		    return true;
	    }
    }
}
